जर x3339 या संख्येला 11 ने पूर्ण भाग जात असेल, तर x हा अंक कोणता आहे?
A2
B4
C5
D3
Answer & Solution
Correct answer: C. 5
1. 11 ची विभाज्यतेची कसोटी: (विषम स्थानावरील अंकांची बेरीज) - (सम स्थानावरील अंकांची बेरीज) ही 11 च्या पटीत असावी.
2. x3339 साठी, उजवीकडून: विषम स्थाने 9, 3, x; सम स्थाने 3, 3. विषम स्थानांची बेरीज = 12 + x, सम स्थानांची बेरीज = 6.
3. फरक = 6 + x. विभाज्यतेसाठी, 6 + x = 11, म्हणून x = 5.
_Source: RRB Group D CEN-02/2018 PYQ, Q.71._
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